Rotary molding and compression machine.



V. KARBOWSKY. ROTARY MOLDING AND COMPRESSION MACHINE.

APPLICATION FILED AUG. 21'. 1913.

Patentd oct. 6

' 1 sums-sum 1.

THE NORRIS FEYIRS CO PHOTO-LITHO.. WASHINGTON. n I

V. KARBOWSKY.

ROTARY MOLDING AND COMPRESSION MACHINE.

APPLICATION FILED M1611, 1913.

1 1 1 2,455. Patented 0013.6, 1914.

1 SHEETS-SHEET 2.

V. KARBOWSKY. ROTARY MOLDING AND COMPRESSION MACHINE.

APPLICATION FILED um. 21, 1913.

1,1 12,455. Patented Oct. 6, 19m

7 BHEET8-SKBET 3.

I i 17:1 I

V. KARBOWSKY. ROTARY MOLDING AND COMPRESSION MACHINE.

APPLICATION FILED 11118.21, 1913.

1,1 12,455. Patented Oct. '6, 1914.

1 SHEETS-SHEET 4.

THE NOIQRIS PETEES C0,. PHOTU-LITHONIVVIASHINGTUN. D, C,

V. KARBOWSKY. ROTARY MOLDING AND COMPRESSION MACHINE.

APPLICATION FILED AUG.21, 1913.

1 ,1 12,455. Patented Oct. 6, 1914 7 SHEETS-$313M 5".

48 V i... v

V. KARBOWSKY.

ROTARY MOLDING AND COMPRESSION MACHINE.

APPLICATION FILED AUG. 21, 1913.

1,1 12,455. Patented 0011.6, 1914.

7 SHEETB-SHBET 6.

-II'IE NORRIS PETERS C0,; PHOTO'LITHOH WASHINGTON. LL (7.

- Patented Oct. 6, 1914.

'! SHEETS-SHEET '1.

THE NORRIS PEYERS CD.. PHOYO-LITHO" WASHINGTON. D. c

vrcron KARBOWSKY, or TEMPE, new scorn WALESLAUSTRALIA.

ROTARY MOLDING AND COMPRESSION MACHINE.

Specification of Letters Patent.

Patented Oct. 6, 1914.

Application filed August 21, 1913. Serial No. 785,908.

To all whom itmag concern:

Be it known that I, VIcroR KixnBowsKY, a subject of the Czar of Russia,residing in South street, Tempe, in the State of New South WVales,Commonwealth of Australia, have invented certain new andusefulImprovements in Rotary Molding and Compression Machines, of which thefollowing is a specification.

This invention refers to the molding and compression, prior to thehardening, annealing or vitrifying process, of building blocks, bricksor such like articles composed of ma terial plastic during manufacture,and specifically to molding machines of the type comprising a rotatablebarrel having peripheral molds each containing a piston for supportingthe charge during compression and operating to eject the molded block,said molds being entered for charge compression purposes at their outerends by supported surfaces of the periphery of a further barrel rotatingsynchronously with the main and mold barrel. And the objective of thepresent invention is to effect such structural improvements andadditions to machines of the type before specified as to provide animproved machine for the purpose, combining positive action withsimplicity of construction and adaptability for ready renewal and repairof the working integers or parts, and further so that the compressionoperation is not only increased but is effected in progressive stepsalong the barrel thus decreasing the strain imparted to the barrel shaftand bearings. And according to this invention these improvements consist essentially in disposing the peripheral molds in the barrel instaggered longitudinal series (the molds in a circumferential planebeing equidistant from each other); providing in each of the moldcavities aspring returned piston operating to support the charge duringcompression and to finally eject same and being supported and actuated 1by fixed cams on the central shaft about which said barrel rotates;effecting the compression operation in each mold by means of theentrance into each of a plunger similarly disposed and operated as thepistons before described, the barrel carrying such plungers beingarranged for synchronous rotation with the main barrel; and the meansfor adjusting the capacity of the molds and the degree of compression ashereinafter fully described with the aid of the acco1npanying drawingsand claimed in the appended claims.

Referring to the accompanying drawingsz-Figure 1 is perspective view ofa rotary molding machine according to this invention. Fig. 2 is Verticalsection of machine. Fig. 8 is section on line 33 of Fig. 2. Fig. lissection on line 4:4: of Fig. 2. Fig. 5 is section on line 5-5 of Fig. 2.Fig.6 is section on line 66 of Fig. 2. Fig. 7 is section on line 7-7 ofFig. 2. Fig. 8 is enlarged perspective view of one of the mold pistonsemployed in themain barrel, Figs. 9 and 1.0 being sections of the sameon planes 99 and 10-10 respectively of Fig. 8. Fig. 11 is similar viewto Fig. 8 of one of the pistons in the supplementary barrels andemployed for block compression purposes, F 12 being section of the same011 plane 12-l2 of Fig. 11. Fig. 13 is perspective view of adjustablecam device supporting the pistons in the main barrel during the finalblock compression operation, Fig. 14; being cross section on plane ll14: of Fig. 13, and Fig. 15 a longitudinal 360% tion of the same, andFig. 16 is a diagrammatic vertical section illustrating more clearly therelative operation of the pistons and plunger-s before referred to.

The rectangular hopper or chute 17 disposed above the main barrel 1Sdelivers the plastic material to the plurality of peripheral molds 1,9in said barrel, which molds 19 are arranged in echelon longitudinallyand disposed in circumferential equi-distant series as shown, (see Figs.1 and l) and to prevent the escape of any'material between the delivery:orifice of the hopper l7 and the periphery of said barrel 18, the lowerend of the hopper fits closely 011 said periphery.

Each of the rectangular molds 19 has op erating therein a hollow piston20' (see Figs. 8, 9. and ,10) the outer ends of which are closed by a'cap 21 secured in position by a a spring 22 attached to the underneathsur-' face of same and to the through rod 28 terminally held in theperipheral wall ofthe barrel 18 and passing through the slot 24centrally positioned in said piston 20 as shown; and said spring alsoacts to return the piston 20 within the mold cavities as hereinafter setout. The inner end 25 of said pistons 20 is reduced and terminallyrounded as are also the shoulders 28 which with said reduced end bearupon the surfaces of cam barrel 26.

The hollow cam barrel 26 positioned longitudinally and centrally Withinthe main barrel 18 has provided thereon the projecting surfaces 31 eachconcentric to the a housing recess 33 in the cam barrel, provided forthevertically adjustable T-shaped supporting plates 34 for the pistonswhen disposed below and receiving a charge from the hopper 17. TheseT-plates 34 are adjusted vertically to regulate the depth of the molds19 by means of a through rod 35 having offset fingers 36 taking in aslot 37 provided in the vertical members of each of said plates 34. Thethrough rod 35 has a terminal handle 38 for adjustment purposes saidhandle being secured in set position by a'wing nut 39 passing throughthe angular bracket 40 affixed to the frame member 41 of. the machine(see Fig. 1). Positioned ahead of said T-plates 34 on the cam barrel 26are the approximately parallel cam surfaces 42 and 43 the inner 42 ofwhich support the inner ends and the outer 43 Sup ports the shoulders 28of the pistons 20 during the compression operations hereinafterdescribed. The cam surfaces 42 each terminate at the lower end in a camsurface 44 which acts to force the pistons 20 outwardly and effectdischarge of the compressed charges from the molds 19, said surface 44merging into the concentric surfaces 31 hereinbefore described.

For the purpose of rigidly backing the shoulders 28 of the pistons 20during the final compression step, horizontal backing plates 45 areprovided passing through the wall of the cam barrel 26 and supported attheir inner ends by the cam 46 adjustable for the purpose hereinafterstated being mounted on the through shaft 47 and provided with slot 48engaging the T head 49 attached to the backing plate 45, the said shafthaving terminal handle 50 held secure by a wing nut 51 passingtherethrough and I through the slotted quadrant plate 52 afiixed to themachine framing member 41. The said cam 46 is supported on the oppositeside to that of the backing plates 45 by an internal rib 53 on the innersurface of the cam barrel 26 (see Figs. 2 and 16).

The cam barrel 26 has terminally reduced portions 54 fixed in thevertical framing members 41- and the main barrel 18 rotates on theportions 55 of said cam barrel, the circular plates 56 closing the endsof the barrel 18 being fitted over said portions 55 (see Fig. 3). Theend plates 56 of the barrel 18 have peripheral spur wheels 57 meshingwith gear wheels 58 mounted on the transverse shaft 59 rotated by wormwheel 60 meshing with worm power shaft 61 (see Figs. 2 and 4).

For driving the off-take apron conveyer 62 a sprocket 63 is provided onthe shaft 59 which is connected by a toothed belt 64 to the sprocket 65affixed to the shaft 66 of the driving roller 67 of the said conveyer62.

Positioned ahead of the hopper in the direction of rotation of the mainbarrel are the barrels 68 and 69 of similar but smaller construction tosaid main barrel 18 and each gearing by a central spur wheel 70 with asimilar spur wheel 71 on the main barrel.

The plungers 72 contained in each of the barrels 68 and 69 are eachprovided with clearance recesses 7 3 at their outer ends and areoperated by cam barrels 74 and 75 contoured as and for the purposehereinafter described. The ends of the cam barrels 74 and 7 5 are eachsecured to the frame members 41 and the barrels 68 and 69 rotate aboutthe bosses 76. As molds are not required in the periphery of the barrels68 and 69 it is not necessary to retract the plungers 72 below theperipheral surface of said barrels (see Figs. 2 and 16).

In use the plastic material being fed into the hopper 17 by any suitablemeans as from an overlying pug-mill, and the barrels 18, 68 and 69rotating in the direction indicated by the arrows in Figs. 2 and 16, thepistons 20 disposed immediately below the hopper will be retracted (theinner ends being support ed by the T plates 34) to form the molds 19 toreceive a charge of the material. The charged molds now proceedingtoward the uppermost 68 of the supplementary barrels the opposing seriesof plungers 72 in such barrel will register in the same. Thisregistration will be effected by the peculiarly shaped cam portion 77 onthe cam barrel 7-1- (see Figs. 2 and 16) consisting of three peaksconjoined by flatted portions. the central peak operating to impart asudden and limited outward movement to the plungers for effectingpreliminary solidification of the charges.

The partly compressed charges in the main barrel 18 now proceeding tothe lower 69 of the supplementary barrels, the pistons 20 will be movedslightly outward by the cam surfaces 42 and 43 and the opposing plungers72 in said lower barrel will, be protruded from their housings by thepeaked cam portion 7 7* on the cam barrel 75 to bear upon the outerfaces of the previously partly compressed charges. Proceeding, thepistons 20 will have further outward movement imparted to them by thebifurcated backing plates 45 taking against the shoulders 28 while theplungers 72 will travel in a chordal line by reason of the depressioncontained between said peaked cam portion 7 7 on the cam barrel 75, ashereinafter explained. At this stage the second and final compression ofthe charges in the molds 19 is taking place and when effected the camsurface 44 on the cam barrel 26 operates to force the pistons 20 fartherout and eject the blocks on to the underlying ofi -take conveyer 62. Therotating pistons 20 and plungers 72 will now be held at the limit oftheir outward stroke by the concentric surfaces on the cam barrels 26,74 and 75 until the cycle of operations before described again takesplace, the following pistons and plungers obviously efiecting the samesteps.

It is essential in order to avoid jamming of the plungers 72 in themolds of the main barrel 18, that the faces of the said plungers shouldprogress at exactly the same rate as the particular portion of the saidmolds which they occupy and toeflect this the cam surfaces 77 and 7 7are so formed that from the point of first entrance of the plungers intothe molds until complete withdrawal occurs, the path of the saidplungers 72 is in effect a chord of the main barrel (except where thecenter peak in surface 77 operates momentarily) which chord is at anypoint of its length equidistant from the axial cen ters of the main andsupplementary drum, the retractive contour of the surfaces 77 and 77being to eliminate the effect of angular variation of the plungers 72.This feature is clearly illustrated in Fig. 16 of the drawings which isincluded mainly for that purpose, and also being more clear in itsdelineation to enable the parts to be more clearly indicated by thereference numerals. And in the said Fig. 16 the path of the pistons 20of the main barrel is indicated by the dotted line marked A, and thechordal path of the plungers 72 of the supplementary barrels 68 and 69by the letters B and B respectively. During the passage of the innerends of the pistons20 and plungers 72 along the concentric surfacesmentioned the removal of any material from their outer ends will beeffected by the rotary brushes 78 (see Figs. 1, 2 and It also beingessential that the supplementary barrels 68 and (39 should havesynchronous rotation, the axial centers of same are located on a commoncircumferential line struck from the axial center of the main barrel 18and the said supplementary barrels are so disposed as not to effectintermeshing of their gear wheels.

Lubrication of the cam surfaces is effected where required through thehollow shaft 7 9 from which branches 80 lead to the surfaces as shown inFig. 2.

' held piston, rotating synchronously and gearing with To eliminate therisk of fracture of the framing 41 by reactive force occasioned bythefinal compression operations the ends of the cam barrels 26 and 7 5are held in rigid relative position by straps 81 connected by a unionnut 82 as shown in Fig. 1.

tained within said barrel, concentric SUI? faces 81 and cam surfaces 34,44, 42. and 43 on said cam barrel, cams contanied within said cam barreland supported by an internally projecting rib on the latter, said camsslotted and adjustable radially by a through rod passing through theends of the said barrel, and piston backing plates 45 supported "by saidcams, "if-shaped piston backing 7 plates housed within and passingthrough the wall of said cam barrel,-and a through ro-dhaving fingerstaking in a slot in each of said T-plates, as herein set forth.

2. In rotary molding and compression machines for plastic material, incombination, a rotary barrel having a plurality of peripheral molds eachcontaining a hollow piston 20 having a reduced end and rounded inneredges, a cap closing the outer end of each of said pistons, a centralslot in said pistons and a through rod in said slot, said rods held inthe wall of the rotary barrel and connected to said caps by springs asherein set forth. 7

3. In rotary molding and compression machines for plastic material, incombination, a rotary barrel having a plurallty of peripheral molds eachcontaining a spring a palr of supplementary barrels said rotary moldbarrel, spring held radial plungers in said supplementary barrels, saidplnngers having clearance recess-es in their outerends, cam barrels 74and 75 contained one in each of said supplementary barrels, camsurfaces77 on said cam barrel 74 and cam surfaces 7 7 a on said barrel 75, as herein specified.

4. In rotary molding and compression machines for plastic material, incombination, a. rotary barrel having a plurality of circumferentialseries of mold cavities arranged in echelon longitudinally of thebarrel, spring held pistons contained within each of said cav1t1es, afixed hollow cam barrel contained within said barrel, concentricsurfaces 31 and cam surfaces 34, 44, 42 and 43 on said cam barrel, camscontained within said cam barrel and supported by an internallyprojecting rib on the latter, said cams slotted and adjustable radiallyby a through rod passing through the ends of said barrel, piston backingplates supported by said cams, T-shaped piston backing plates housedwithin and passing through the wall of said cam barrel, a

; through rod having fingers taking in a slot 1n each of sa1d T-platesand passing through the rotary mold barrel, a hopper or chutesuperposing said rotary barrel, a pair of supplementary barrels gearingwith said rotary mold barrel, spring held radial plungers in saidsupplementary barrels, clearance recesses in the outerends of saidplungers, cam barrels 74 and 7 5 contained one in each of saidsupplementary barrels, cam surfaces 77 on said cam barrel 7 4 and camsurfaces 77 on said cam barrel 7 5, vertical framings 41 containing andsupporting said mold and supplementary barrels, as herein set forth.

5. In rotary molding and compression machines for plastic material, incombination, a rotary barrel having a plurality of circumferentialseries of mold cavities arranged in echelon longitudinally of thebarrel, spring held pistons contained within each of said cavities, afixed hollow cam barrel contained within said barrel, concentricsurfaces 31 and cam surfaces34, 44, 42 and 43 on said cam barrel, camscontained within said cam barrel and supported by an internallyprojecting rib on the latter, said cams slotted and adjustable radiallyby a through rod passing through the ends of said barrel, piston backinplates 45 supported by said cams, t -shaped piston backing plates housedwithin and passing through the wall of said cam barrel, a through rodhaving fingers taking in a slot in each of said E -plates and passingthrough the rotary mold barrel, a hopper or chute superposing saidrotary barrel, a pair of supplementary barrels gearing with said rotarymold barrel, spring held radial plungers in said supplementary barrels,clearance recesses in the outer ends of said plungers, cam barrels '74and 75 contained one in each of said supplementary barrels, cam surfaces77 on said cam barrel 7 4 and cam surfaces 77 on said cam barrel 75,vertical framings 41 containing and supporting said mold andsupplementary barrels, an off-take belt conveyor positioned below saidmold barrel and driven by a sprocket on a transverse shaft geared to thepower shaft a toothed belt connecting said sprocket to a Copies of thispatent may be obtained for five cen further sprocket on the shaft of thedriving roller of said conveyor, as herein set forth.

6. In rotary molding and compression machines for plastic material, incombination, a rotary barrel having a plurality of circumferentialseries of mold cavities arranged in echelon longitudinally of thebarrel, spring held pistons contained within each of said cavities, afixed hollow cam barrel contained within said barrel, concentricsurfaces 31 and cam surfaces 84, 44, 42 and 43 on said cam barrel, camscontained within said cam barrel and supported by an internallyprojecting rib on the latter, said cams slotted and adjustable radiallyby a through rod passing through the ends of said barrel, piston backingplates 45 supported by said cams, T-shaped piston backing plates housedwithin and passing through the wall of said cam barrel, a through rodhaving fingers taking in a slot in each of said T-plates and passingthrough the rotary mold barrel, a hopper or chute superposing saidrotary barrel, a pair of supplen'ientary barrels gearing with saidrotary mold barrel, spring held radial plungers in said supplementarybarrels, clearance recesses in the outer ends of said plungers, cambarrels 74 and 75 contained one in each of said supplementary barrels,cam surfaces 77 on said cam barrel 74 and cam surfaces 77 on said cambarrel 75, vertical framings 41 containing and supporting said mold andsupplen'ientary barrels, an off-take belt conveyer positioned below;said mold barrel and driven by a sprocket on a transverse shaft gearedto the power shaft a toothed belt connecting said sprocket to a furthersprocket on the shaft of the driving roller of said conveyor, peripheralspur wheels on the closed circular ends of said mold barrel, gearingwith spur wheels mounted on an underlying tansverse shaft rotated by aworm wheel meshing with a worm power shaft, and rotary brushes havingperipheral contact with the outer ends of the pistons in the mold barreland of the plungers in the supplementary barrels, as herein set forth.

Signed at Sydney, New South \Vales, this eleventh day of July, 1913.

VICTOR KAltBOlVSKY. Witnesses CHAS. HA'r'roN, WM. NEWTON.

ts each, by addressing the Commissioner of latents,

Washington, D. G.

